EP 0458557 A1 19911127 - Procedure for qualifying synthetic base gear lubricant.
Title (en)
Procedure for qualifying synthetic base gear lubricant.
Title (de)
Verfahren zur Qualifizierung eines synthetischen Getriebeschmiermittels.
Title (fr)
Procédé pour juger la qualité d'un lubrifiant pour engrenages synthétiques.
Publication
Application
Priority
US 52682390 A 19900522
Abstract (en)
A procedure for qualifying a proposed synthetic lubricant includes: (1) compatibility testing the proposed lubricant with previously approved synthetic lubricants; (2) stability testing the lubricant for thermal oxidation by testing the lubricant in a heated gear box; (3) corrosion testing the proposed lubricant by a copper strip tarnish test; (4) field testing the proposed lubricant to evaluate the ability of the lubricant to withstand extended drain intervals while still performing its function; and analyzing all of the results of those tests. In another embodiment, the lubricant furthermore undergoes a seal life test to evaluate the appearance of various covers and seals for degradation due to long term exposure to the lubricant. <IMAGE>
IPC 1-7
IPC 8 full level
G01N 33/30 (2006.01)
CPC (source: EP US)
F16H 57/041 (2013.01 - EP US); G01N 33/30 (2013.01 - EP US)
Citation (search report)
- [A] GB 1450685 A 19760922 - INT RESEARCH & DEV CO LTD
- [A] FR 557248 A 19230804
- [A] DE 716497 C 19420121 - VACUUM OEL AG DEUTSCHE
- [A] GB 764183 A 19561219 - SHELL RES LTD
- [A] REVUE DE L'INSTITUT FRANCAIS DU PETROLE. vol. 40, no. 6, December 31, 1985, PARIS FR pages 831 - 842; J. AYEL: 'Severisation de l'essai de capacite de charge des lubrifiants sur machine a engrenages FZG '
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0458557 A1 19911127; EP 0458557 B1 19950809; AU 644987 B2 19931223; AU 7709191 A 19911128; CA 2042928 A1 19911123; CA 2042928 C 19990330; DE 69111900 D1 19950914; DE 69111900 T2 19960404; ES 2075349 T3 19951001; TR 26665 A 19950315; US 5157963 A 19921027
DOCDB simple family (application)
EP 91304509 A 19910520; AU 7709191 A 19910516; CA 2042928 A 19910521; DE 69111900 T 19910520; ES 91304509 T 19910520; TR 50891 A 19910521; US 52682390 A 19900522